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Enhancement of Platinum Mass Activity on the Surface of Polymer-wrapped Carbon Nanotube-Based Fuel Cell Electrocatalysts

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The Paper of Prof. Naotoshi Nakashima (Department of Applied Chemistry, Faculty of Engineering, Kyushu University / Principal Investigator, Fuel Cell Research DivisionI²CNER), Assoc. Prof. Tsuyohiko Fujigaya and his collaborators was published in “Scientific Reports” on September 5, 2014.

 

■ Summary

Cost reduction and improved durability are the two major targets for accelerating the commercialization of polymer electrolyte membrane fuel cells (PEFCs). To achieve these goals, the development of a novel method to fabricate platinum (Pt)-based electrocatalysts with a high mass activity, deposited on durable conductive support materials, is necessary. In this study, we describe a facile approach to grow homogeneously dispersed Pt nanoparticles (Pt) with a narrow diameter distribution in a highly controllable fashion on polymer-wrapped carbon nanotubes (CNTs). A PEFC cell employing a composite with the smallest Pt nanoparticle size (2.3 nm diameter) exhibited a,8 times higher mass activity compared to a cell containing Pt with a 3.7 nmdiameter. This is the first example of the diamter control of Pt on polymer-wrapped carbon supporting materials, and the study opens the door for the development of a future-generation of PEFCs using a minimal amount of Pt.

 

■ Paper

Title: Enhancement of Platinum Mass Activity on the Surface of Polymer-wrapped Carbon Nanotube-Based Fuel Cell Electrocatalysts

Authors: Inas H. Hafez, Mohamed R. Berber, Tsuyohiko Fujigaya, and Naotoshi Nakashima

DOI: 10.1038/srep06295

Publication Date (Online): September 5, 2014